Volume 15, Issue 74 (vol. 15, no. 74 2026)
jispp 2026, 15(74): 215-235 |
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Noori M, Maleki M, Karimi R. The combined effect of phenylalanine and glycinebetaine on physiological and biochemical indices related to salt tolerance in grapevine. jispp 2026; 15 (74) : 11
URL: http://jispp.iut.ac.ir/article-1-2232-en.html
URL: http://jispp.iut.ac.ir/article-1-2232-en.html
1- Department of Biology, Faculty of Basic Sciences, Malayer University, Malayer, Iran
2- Department of Biology, Faculty of Basic Sciences, Malayer University, Malayer, Iran ,masoumemaleki@gmail.com
3- Department of Horticulture and Landscape Engineering, Faculty of Agriculture, Malayer University, Malayer, Iran
2- Department of Biology, Faculty of Basic Sciences, Malayer University, Malayer, Iran ,
3- Department of Horticulture and Landscape Engineering, Faculty of Agriculture, Malayer University, Malayer, Iran
Abstract: (181 Views)
Salinity stress has been one of the most important factors limiting plant growth and is an increasing problem for agriculture worldwide. Grapes are one of the plants sensitive to salinity, and high salt concentrations lead to reduced growth and yield. The present study aimed to investigate the application of glycine betaine (5 mM) and phenylalanine (5 mM) on salinity (100 mM NaCl) tolerance of one-year-old grape seedlings of the Yaghott variety; it was conducted as a factorial study in a completely randomized design. Glycine betaine and phenylalanine treatments were applied as foliar sprays in two stages. After six weeks from the first salinity treatment, leaf samples were transferred to the laboratory for measuring factors. Based on the results, salinity stress led to a decrease in total chlorophyll, carotenoids, and relative water content, but these indices were higher with glycinebetaine and phenylalanine treatments than with other treatments. Glycinebetaine and phenylalanine treatments and their supplementation significantly improved the enzymatic (catalase, guaiacol peroxidase, and ascorbate peroxidase activity) and non-enzymatic (phenol and flavonoid) antioxidant systems of grapes under salt stress. It reduced oxidative stress so that the levels of malondialdehyde and hydrogen peroxide and the percentage of ion leakage were lower than the control. The highest proline and soluble sugar content was found in treated vines. Also, in the treatments used, the amount of chlorine and sodium decreased, but the accumulation of nutrients increased. Overall, foliar application of glycinebetaine and phenylalanine had an effect on the antioxidant system, the accumulation of compatible osmolytes, and the content of nutrients, reducing the effects of salinity on grape seedling leaves.
Article number: 11
Type of Study: Research |
Subject:
Salt Stress
Received: 2025/07/5 | Accepted: 2025/11/12 | Published: 2026/10/31
Received: 2025/07/5 | Accepted: 2025/11/12 | Published: 2026/10/31
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